Liquid-circulating system



Aug. 26, 1941.. H. sco'r'r-PAINE E-rAL l v 2,253,939-

{ LIQUID CIRCULATING' SYSTEM Filed April 13, 1940 3 Shee'ts-Shee't l A118- 26, l941'- A H. SCOTT-PAINE Erm. 2,253,939'

LIQUID cIRcuLATING SYSTEM f Filedpril 13, 1940 3 SheetS-Sheet 2 ll i s, l s

A118- 26 1941- H. sco'r'r-PAINE Erm. '2,253,939

' LIQUID CIRCULATING SYSTEM y F11-ed April 13, 1940 5 sheets-sheet s Patented 26, 193,41

UNITED STAT Es PATENT oFlFLcE,

starttenv l mourn-cincumrmd srs'rEM miners Scott-Paine and George Sidney Selman,

Hythe, Southampton, England: said Seiman signor to said Scott-Paine Application April 13, 1940, Serial No. 329,532

In Great'Britain March 11, 1939 sommi. (c1. 12s-4174) more inlet and outlet pipes forl connectionwith.

the circulating system and so arranged that the level of liquid in the tank can vary with the fluctuation of the ilowof liquid in the system.

The present invention is more particularly concerned with a tank of this kind for use in a liquid-circulating system in which liquid from two or more sources or circuits flow into `a comr mon part of the circuit, in which casethe tank in or and a halt section on the line 2`2 of Figure l; Figure 3 is a horizontal section on the line 3-3 of Figure 2.

, Figure 4 is an enlarged view vof a part of one of the inlet pipes showing the hood associated with the apertures in the pipe. l'

Figure 5 is a diagrammatic view showing thetank in a cooling system for an intemalhcombustion engine employed in driving a boat.

l' is drawn by a pump I from a-cooling device l -v 4through a pipe 6 and is delivered to 4the said isv arranged to receive the liquid from the two or more sources and deliver it into the common part of the circuit.

.An object of the invention is to provide an improved construction of tank which reduces any tendency of the liquid to become turbulent or surge. A tank in fulnlling this object is particularly suitable for use in a boat,

According-to this invention acompensating tank of the kind referred to for use in liquid circulating systems is characterised in that an inlet'pipe enters the tank at a locality above the i.

normal working level of the liquid therein and is provided with vent holes also above the normal working level of the liquid and has its open dis-V charge end situated near an outlet at the bottom of the tank. .With this arrangement any bubbles which may have become entrained in the liquid are quickly released upon entry of the liquid into l the tank.

In the case where the compensating tank has two inlet pipes the tank is provided with avertical baille and the two inlet pipes are arranged to extend into the tank one on either side of the baille. Preferably, one or more horizontal baies lare also provided in the tank, one of which is situated closely above the discharge ends of the inlet pipes.

Further features of the invention will be evident from the following description of a preferred example of the invention applied to the liquid cooling system of a V-type internal-combustion engine in a high-speed boat.' reference being made Ato the accompanying drawings in As indicated diagrammatically in Figure 5, the engine is provided with two banks of water.- jacketed cylinders I lprovided with inlet pipes 2 and outlets pipes 3, respectively. Cooling liquid inlet pipes 2. The o'utlet pipes 3 deliver the waterfrom the enginei cylinderl tothe top of a compensating devicel which delivers it to the cooling device 3' through a pipe 3 whence Vit flows back again to the pump 4. vThus a closed circuit is provided in two parts. As indicated below,- the compensating device is so constructed as to. prevent surging of the liquid and also to balance the flow of liquid in the -two parts of the circuit. Cooling liquid is circulated through the cooling device by pipes 9. The tank consists of a metal shell tlie sides of which, over the middle portion I0 of the tank, are straight (see Figure 2) and extend over about one-third of the height of the tank. The top and bottom portions II and I2 of the sides con- A extendin/g between the back and front Walls I3 v and I4 and from a Vposition closely above the outlet at the bottom of the tank to a position near the top of the straight side portions I0. The

baille is in the form of a rectangular partition f provided with suitable openings I9, an'd its Ilonlooking in the direction of the arrow in Figure 1 55 gitudinal edges are bexitto form flanges 20 (see Figure 3) by which it is .riveted to the front and back of the tank. y

The vertical baille thus divides the lower part of the tank into.two compartments 2|. and 22;

two pipes' 23, 2l are mounted in the tank, one in each compartment, and each is formed with a horizontal portion 25 (see Figure 1) Apassing through the front of'thetank ata position near the ton Edge It or the vertical baille and each pipe is curved so as toextend through the middle section of the tank and down vertically to a position `lust past the lower ends oi the straight sides i0. The end oi each pipe iscurved at 21 (see Figure 2) about the same centro as the curved portions oi' the converging sides I2 of the tank so that the open ends of the pipes are iacing towardsv the outlet in the bottom oi the tank and the liquid flowing from them is directed towards the outlet opening. Each pipe is secured in position by astay 2l adjacent its lower end secured to the side oi' the tank and by a iiange brazed vto the pipe and riveted to the wall oi' the tank at the point ot entry of the pipe.

The tank is also provided with two horizontal bailes Sli and 3| of which the baille 8l is positioned closely above the open discharge ends of the pipes I1 and the other of which baille 3| is adjacent the top of the straight sidesll of the tank. Each horizontal baille is in the form of two plates oi thin metal oi' substantially rectangular form arranged in line one on either side oi' the vertical banle (see- Figure 3). The

.corners of the partitions are cut-away so as to tre baille. Each of the two-part horizontal baf' fies is provided with four circular openings Il to allow passage otthe liquid, and two of these 'l air passes into the tank.

at the rear of eachE portion of the baille are arof the inlet pipes n so that it is impossible to till the tank by means ot this iliier pipe to a 'level higher than that required. Brackets ll are atcached to the sides of the tank and further ranged so' that the pipes 23 and 2l pas; through k them. The other two openings are arranged in the front of each baille, and in order that these holes may be suiliciently large to allow the required passagev of liquid, without undue weakening ofthe bame, the holes are arrangedon a diagonal -in each part of the bafe and are prokvided with annular stiffening ilanges which may tace in opposite directions. The holes I 8 in the uprightbaille are arranged in a similar diagonal manner.

Vent holes 38 are formed in the top .biV each brackets Il are attached to the top of the tank for securing it to a support.

A suitable water-gauge is secured to the tank in order to indicate the level of the water in it, and a test cock I3 is provided in thelower Dart of the tank.

' It will be appreciated that, in the construction described above, `any air which may be contained in the liquid ilowing into the inlet pipes 2l and 24 is discharged through the vent holes Il and that the construction of tank, which consists of a number of compartments divided by bellies. reduces the surging of liquid in the tank and opposes any tendency towards the turbulent iiow ot the liquid.

We claim:

l. A compensating device ior connection in a liquid circulating system comprising a tank, illiing means near the top of the 'tank preventing the said tank i'rom being filled above a predetermined level, a vertical baille in said tank, two inlet pipes arranged one on either side o! said baule so, as to extend downwardly through said tank from above said level to near the bottom ol the tank, which inlet pipes are provided with vent holes in that part thereof above said level, and an outlet pipe communicating with the bottom of the tank. y n

2. A compensating device for connection in a liquid circulating system comprising a tank, nlling means near the top of the tank preventing the said tank from being iilied above a predetermined level, an inlet pipe arranged to extend downwardly through said tank from above said level to near the bottom of the tank, which inlet 4 pipe communicating with the bottom oi the tank,

pipe 23 over that portion of the pipe vwhich is l substantially horizontal and which is inside the tank, and, in this example, the vent openings are ,formed with hoods- 31 (see Figure 4) in one piece with the pipe and arranged so that the hood openings are transverse to the pipe axis and the hoods are directed in the direction of ilow of liquid in the pipe. Any air which may have become entrained in the water entering the tank is released through-the vent holes Il and ls thus prevented from entering the main body oi' water Y in the tank, thereby preventing surges being Aset up in the water.- Any water escaping with the The tank is closed at its but has a short piece of pipe v8| extending from one side to the other'ol' the tank and provided withv a number' of holes 46 over thatportion of it which -ls inside the tank. Thus lany air which is vented from the inlet pipes can escape through the open end or ends oi this vent pipe.

It is important that the level of the water in y the tank, during. new of the liquid, should not rise above the level oi the vent holes in the pipes,

top end by' s' wsu n and a number of horizontal baiiles within said tank one of which is situated closely above the l discharge end oi' the inlet pipe.

3. A compensating device for connection in a liquid circulating system comprising a tank, illiing means near the top of the tank preventing the said tank from being iilled above a predetermined level, an inlet pipe arranged to ex'- tend downwardly through said tank from above said level to near the bottom oi' the tank. which inlet pipe is provided with a number of vent holes in that part thereof above said level, each oi said vent holes having associated 'therewith a hood directed in the direction of iio'w oi' liquid in the inlet pipe and an outlet pipe communicating with the bottom oi the tank. f

4. A'compensating device for connection'in a liquid circulating system comprising a tank, tilling means near the top of the tank preventing the said tank from being filled above a predetermined level, an inlet pipe arranged to extend downwardly through said tank from above said level to near the bottom of the tank. which inlet pipe is provided with vent holes in that part thereof above said level, a number oi horizontal banles in said, tank, each arranged with "its edges connecting 'with the sides of the tank liquid circulating system comprising a tank, nlling means near the top of the tank preventing the said tank from being filled above a prede:

termined level, an inlet pipe arranged to extend downwardly through said tank from above said level to near the bottom of the tank, which inlet pipe is provided with vent holes in that part thereof above said level, a number of sheet metal horizontally disposed baiiies each arranged with its edges connecting with the sides of the tank and each provided with a number of circular openings surrounded by lips piessed out of the metal, one of which bai'iles is situated closely above the discharge ed of the inlet pipe, and an outlet pipe communicating with the bottom of the tank. y

6. A compensating device for connection in a liquid circulating system comprising a tank which vis substantially rectangular in horizontal crosssection, iilling means near the top of the tank preventing the said tank from being filled above a predetermined level, an inlet pipeV arranged to extend downwardly through said tank from rabove said level'to near the bottom of the tank,

which inlet pipe is provided with vent holes in that part thereof above said level, a number of rectangular horizontally disposed bai'iies each arranged with its edges connecting withA the sides of the tank and each having its corners cut away to provide apertures, one of which baffles is situated closely above the discharge end of the inlet pipe, and an outlet pipe communicating with the Ibottom of the tank. y

'1. A compensating'device for connection in a liquidl circulating system comprising a closed tank, filling means near the top of the tank preventing the said tank from being lled above a predetermined level, an inlet pipe arranged to extend downwardly through said tank from which inlet pipe is provided with vent holes in that part thereof above said level, an outlet pipe communicating with the bottom of the tank, and an open ended pipe extending through the tank from one side thereof to the other side above said Vlevel and closely adjacent the top of the tank and having openings therein within vertical baiiie and arranged to extend from above said level down to near the bottom of the tank,

the lower end of each of said inlet pipes being directed towards said outlet pipe and the upper part of each inlet pipe above said level being provided with a number of apertures.

9. A compensating device forv connection in a liquid circulating system comprising a tank, nlling means near the top oi' the tank preventing the said tank from being lled above a prede' termined level, an inlet pipe arranged to extend horizontally through a side wall of the tank above said level and then to extend downwardly through said tank to near the bottom thereof, which inlet pipe is provided in the horizontal l portion thereof within the tank with vent holes above said level to near the bottom of the tank,

each of which vent holes has associated-therewith a hood,= directed vin the direction of flow of liquid in the horizontal portion of the inlet pipe, and an outlet pipe communicating with the bottom of the tank.`

` HUBERT SCOTT-PAINE.

GEORGE SIDNEY BELM'AN. 

